Dynamic Frequency Allocation to Mitigate Tropospheric Ducting

1. One or more non-transitory computer-readable storage media having computer-executable instructions embodied thereon that, when executed, perform a method for mitigating interference caused by tropospheric ducting, the method comprising: at a server having one or more processors, receiving one or more values of atmospheric conditions in at least a region located between a first base station and a second base station, wherein the first base station has one or more first base station antennas and the second base station has one or more second base station antennas; determining an interference probability based on the one or more values of atmospheric conditions; determining an interference level for one or more signals transmitted from the first base station; based on at least the interference probability and the interference level, determining whether to utilize a ducting mitigation mode, wherein the ducting mitigation mode comprises a state where at least a portion of the one or more first base station antennas are operating at one or more first base station frequencies and at least a portion of the one or more second base station antennas are operating at one or more second base station frequencies, wherein the one or more first base station frequencies and the one or more second base station frequencies are different; and upon determining to utilize the ducting mitigation mode, instructing the first base station to perform one or more adjustments for the portion of the one or more first base station antennas in accordance with the ducting mitigation mode.

2. The media of claim 1 , wherein the first base station is located at a predetermined distance from the second base station that is based on a guard period, wherein the guard period is an interval of time between downlink and uplink transmission periods.

3. The media of claim 1 , wherein the portion of the one or more first base station antennas are generally orientated towards the portion of the one or more second base station antennas.

4. The media of claim 1 , wherein the interference probability comprises a likelihood of tropospheric ducting in the region located between the first base station and the second base station.

5. The media of claim 1 , wherein the one or more values of atmospheric conditions includes a refractive index value of a signal path of the one or more signals transmitted from the first base station.

6. The media of claim 5 , wherein determining the interference probability includes comparing the refractive index value to one or more refractive index thresholds.

7. The media of claim 1 , wherein the interference level is based on one or more of uplink noise rise, call failure rate, or call drop rate.

8. The media of claim 1 , wherein the method further comprises receiving a threshold interference level and wherein determining whether to utilize the ducting mitigation mode includes comparing the interference level to the threshold interference level.

9. The media of claim 1 , wherein the one or more adjustments for the portion of the one or more first base station antennas includes disabling one or more channels used by the portion of the one or more first base station antennas that are operating at a frequency that is the same as one of the second base station frequencies.

10. The media of claim 1 , wherein the one or more adjustments for the portion of the one or more first base station antennas includes adjusting the one or more first base station frequencies to be different than the one or more second base station frequencies.

11. The media of claim 1 , wherein the method further comprises instructing the first base station to perform one or more readjustments to the portion of the one or more first base station antennas, wherein the one or more readjustments undo the one or more adjustments performed according to the ducting mitigation mode.

12. The media of claim 1 , wherein the server is a component of the first base station.

13. The media of claim 1 , wherein the server is a component of a base station other than the first base station and wherein instructing the first base station to perform one or more adjustments includes sending instructions to the first base station over X2 links.

14. One or more non-transitory computer-readable storage media having computer-executable instructions embodied thereon that, when executed, perform a method for mitigating interference caused by tropospheric ducting, the method comprising: at a first base station having one or more first base station antennas, receiving one or more values of atmospheric conditions for at least a region located between the first base station and a second base station, wherein the second base station has one or more second base station antennas and is located at a predetermined distance from the first base station; determining an interference probability based on the one or more values of atmospheric conditions; determining an interference level for one or more signals transmitted from the first base station; based on at least the interference probability and the interference level, determining whether to utilize a ducting mitigation mode, wherein the ducting mitigation mode comprises a state where at least a portion of the one or more first base station antennas are operating at one or more first base station frequencies and at least a portion of the one or more second base station antennas are operating at one or more second base station frequencies, wherein the one or more first base station frequencies and the one or more second base station frequencies are different; and upon determining to utilize the ducting mitigation mode, disabling one or more channels used by the portion of the one or more first base station antennas that are operating at a frequency that is the same as one of the second base station frequencies.

15. The media of claim 14 , wherein the one or more values of atmospheric conditions includes a refractive index value of a signal path of the one or more signals transmitted from the first base station.

16. The media of claim 14 , wherein the method further comprises, at a predetermined time, enabling the one or more channels that were disabled.

17. The media of claim 16 , wherein the predetermined time corresponds to an end of an off-peak period, wherein the off-peak period comprises a time period associated with low usage of a cellular network that includes the first base station.

18. A system for mitigating interference caused by tropospheric ducting, the system comprising: a first base station with one or more first base station antennas; a second base station with one or more second base station antennas, wherein the second base station is located at a pre-determined distance from the first base station; and a server having one or more processors and one or more non-transitory computer storage media configured to: receive one or more values of atmospheric conditions for at least a region located between the first base station and the second base station; determine an interference probability based on the one or more values of atmospheric conditions; determine an interference level for one or more signals transmitted from the first base station; based on the interference probability and the interference level, determine whether to utilize a ducting mitigation mode, wherein the ducting mitigation mode comprises a state where at least a portion of the one or more first base station antennas are operating at one or more first base station frequencies and at least a portion of the one or more second base station antennas are operating at one or more second base station frequencies, wherein the one or more first base station frequencies and the one or more second base station frequencies are different; upon determining to utilize the ducting mitigation mode, instruct the first base station to perform one or more adjustments for the portion of the one or more first base station antennas in accordance with the ducting mitigation mode; and instruct the first base station to perform one or more readjustments to the portion of the one or more first base station antennas, wherein the one or more readjustments undo the one or more adjustments performed according to the ducting mitigation mode.

19. The system of claim 18 , wherein the one or more adjustments for the portion of the one or more first base station antennas includes disabling one or more channels used by the portion of the one or more first base station antennas that are operating at a frequency that is the same as one of the second base station frequencies.

20. The system of claim 18 , wherein the one or more readjustments occurs at an end of an off-peak period, wherein the off-peak period is a time period associated with low usage of a cellular network that includes the first base station.